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Home › Gemstones › Natural Untreated Gemstones

Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
Blue Natural Untreated Gemstones
Brown Natural Untreated Gemstones
Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
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6.48ct Multicolor Tourmaline, Fancy, Transparent
Tourmaline Product Video (756095)

6.48ct Multicolor Tourmaline, Fancy, Transparent

15.1 x 10.5 mm

$ 194.40

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13.21ctw Black Spinel, Round, Opaque

13.21ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 41.10

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30.81ct Violet Amethyst, Oval, IF
Amethyst Product Video (508968)

30.81ct Violet Amethyst, Oval, IF

20.2 x 16.6 mm

$ 236.29

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1.59ctw Green Peridot, Oval, VVS-VS

1.59ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 22.17

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72.09ct Green Uvarovite Garnet Drusy, Fancy, Opaque
Uvarovite Garnet Drusy Product Video (744230)

72.09ct Green Uvarovite Garnet Drusy, Fancy, Opaque

36.1 x 33.7 mm

$ 234.55

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3.70ct Yellow Citrine, Oval, VVS-VS

3.70ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 29.47

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1.15ct White Sillimanite Cat'S Eye, Oval, Transparent

1.15ct White Sillimanite Cat'S Eye, Oval, Transparent

7.4 x 4.7 mm

$ 3.59

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1.22ct Green Sphene, Oval, Transparent

1.22ct Green Sphene, Oval, Transparent

6.6 x 5.7 mm

$ 6.08

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1.96ct Multicolor Spectrolite, Oval, Opaque

1.96ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 8.96

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1.72ctw Red Spessartite Garnet, Round, VS

1.72ctw Red Spessartite Garnet, Round, VS

4.3 mm

$ 58.42

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6.25ct Green Prehnite, Fancy, Translucent

6.25ct Green Prehnite, Fancy, Translucent

15 x 10 mm (calibrated)

$ 10.28

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15.16ct Violet Amethyst, Pear Shape, VVS-VS

15.16ct Violet Amethyst, Pear Shape, VVS-VS

21.2 x 15.8 mm

$ 105.69

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0.53ct Orange Sphalerite, Round, SI

0.53ct Orange Sphalerite, Round, SI

4.5 mm (calibrated)

$ 26.39

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2.67ct Multicolor Labradorite, Pear Shape, Translucent

2.67ct Multicolor Labradorite, Pear Shape, Translucent

10.5 x 7.5 mm

$ 5.91

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0.92ct Green Peridot, Oval, VS

0.92ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.42

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32.82ct Multicolor Jasper, Pear Shape, Opaque

32.82ct Multicolor Jasper, Pear Shape, Opaque

28.8 x 25 mm

$ 35.96

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0.73ct Orange Zircon, Oval, VVS

0.73ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 10.91

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7.15ct Multicolor Agate, Round, Opaque

7.15ct Multicolor Agate, Round, Opaque

11 mm (calibrated)

$ 7.12

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2.69ct Yellow Citrine, Oval, VVS-VS

2.69ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 18.76

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0.51ct Yellow Sphalerite, Round, SI-I1

0.51ct Yellow Sphalerite, Round, SI-I1

4.5 mm (calibrated)

$ 25.40

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1.85ct Purple Rhodolite Garnet, Oval, VVS

1.85ct Purple Rhodolite Garnet, Oval, VVS

8.2 x 6.5 mm

$ 64.49

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2.32ctw Multicolor Andalusite, Oval, VS

2.32ctw Multicolor Andalusite, Oval, VS

5 x 3 mm (calibrated)

$ 123.94

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1.33ct Green Prehnite, Oval, Transparent/Translucent

1.33ct Green Prehnite, Oval, Transparent/Translucent

7.2 x 6 mm

$ 5.97

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6.34ct Brown Moonstone, Oval, Translucent

6.34ct Brown Moonstone, Oval, Translucent

13 x 9 mm (calibrated)

$ 13.69

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Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 9 star ratings

I do enjoy this website and the wide selection. I would like to see more untreated stones. I also wasn't able to see my past order when I logged in.

Posted By Great selection, ok website in July, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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